And they come in their own very hard shell.

们都有非常坚硬的外壳。

So Venus has a sort of unbroken shell all around the planet.

所以金星在行星周围有一层完整的外壳。

But there is something about a charred crust on a meat.

但肉上有烧焦的外壳。

Instead, they have a hard outer shell, called an exoskeleton, that gives them their structure.

，们有一个坚硬的外壳，称为外骨骼，这让们的身体有支撑。

Yes. - Like a banana's good. It has its own casing, but you can't eat the peel.

是的。- 就像香蕉一样。有自己的外壳，但你不能吃皮。

It's got an external skeleton, it's got jointed limbs, but, perhaps most remarkably, these, because these are compound eyes.

有自己的外壳，还有节肢，但最重要的，也许就是这些复眼。

A kernel of popcorn has a stronger shell, or hull, which makes it better at trapping steam.

爆米花的内核有更坚硬的外壳，这使得能更好地捕获蒸汽。

Now, a " tortoise" is also a slow-moving reptile that has a hard shell.

现在，“乌龟”也是一种移动缓慢的爬行动物，有坚硬的外壳。

See, most of life jackets have an outer shell made of nylon.

看，大多数救生衣都有尼龙制成的外壳。

Brazil nuts have very hard shells.

西坚果有非常坚硬的外壳。

It has a hard shell – that is, the outer part of its body is hard.

有一个坚硬的外壳——也就是说，身体的外部是坚硬的。

So you have the crisp crust, you've got that delicious apple compote, and then a layer of cooked apples on top.

所以你有酥脆的外壳，你有美味的苹果蜜饯，然后在上面涂上一层煮熟的苹果。

The octopus is one of my favorites, but others include jellyfish and spiders, who have a hard outer shell called an exoskeleton instead of a skeleton inside their bodies.

章鱼是我最喜欢的动物之一， 但其他动物包括水母和蜘蛛，们有一个坚硬的外壳， 称为外骨骼， 而不是体内的骨骼。

And this worldwide expansion of the leatherback's family showed how successful their body plan -- that is, big, and with a skin-covered shell -- can be, in the right conditions.

棱皮龟家族在全球范围内的扩张表明， 在适当的条件下， 们的身体计划——即体型庞大，并有皮肤覆盖的外壳——是多么成功。

California Sheephead use pointed teeth from their oral jaws to pry urchins off rocks before crushing their spiny exteriors in strong pharyngeal jaws that have fused with the bones of their skulls.

美丽突额隆头鱼会用们口颌上的的尖牙把海胆从石头上撬下来，然后再用和头骨融合的强力咽颌粉碎掉们有刺的外壳。

Now once these are nice and fine, as you can see here, we're going to add some melted butter that way the cookie crumbs cling together and you have a nice crust.

现在，一旦这些都很好， 就像你在这里看到的那样，我们将添加一些融化的黄油， 这样饼干屑就会粘在一起， 你就会有一个漂亮的外壳。

Newly shielded organisms might have gotten eaten less, maybe they were better protected from the ocean, but partially hard creatures survived more than their squishy friends, and like I always say, that's what matters in the game of natural selection.

新出现的有外壳保护的生物被吃掉的概率更小，也许们受到海洋的影响更少，但是部分坚硬的生物比们湿软的朋友存活率更高，就像我常说的，这是自然选择游戏中最重要的。